Use the new of_pci_get_host_bridge_resources() API in place of the PCI OF
DT parser.

[bhelgaas: changelog]
Tested-by: NJames Morse <james.morse@arm.com>
Tested-by: NGabriel Fernandez <gabriel.fernandez@st.com>
Tested-by: NMinghuan Lian <Minghuan.Lian@freescale.com>
Signed-off-by: NZhou Wang <wangzhou1@hisilicon.com>
Signed-off-by: NGabriele Paoloni <gabriele.paoloni@huawei.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NPratyush Anand <pratyush.anand@gmail.com>